<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
  <!-- 关系：样式表 -->
  <link rel="stylesheet" href="./my.css">
</head>
<body>

<!-- css到底能写在哪里 -->
<p>这是p标签</p>
<div style="color: red; font-size: 30px">这是div标签</div>
<div>这个div是啥颜色</div>
</body>
</html>
